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author | Franklin Wei <git@fwei.tk> | 2017-01-21 15:18:31 -0500 |
---|---|---|
committer | Franklin Wei <git@fwei.tk> | 2017-12-23 21:01:26 -0500 |
commit | a855d6202536ff28e5aae4f22a0f31d8f5b325d0 (patch) | |
tree | 8c75f224dd64ed360505afa8843d016b0d75000b /apps/plugins/sdl/src/video/ataricommon/SDL_atarigl.c | |
parent | 01c6dcf6c7b9bb1ad2fa0450f99bacc5f3d3e04b (diff) | |
download | rockbox-a855d6202536ff28e5aae4f22a0f31d8f5b325d0.tar.gz rockbox-a855d6202536ff28e5aae4f22a0f31d8f5b325d0.zip |
Port of Duke Nukem 3D
This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL
for Rockbox.
Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9
Diffstat (limited to 'apps/plugins/sdl/src/video/ataricommon/SDL_atarigl.c')
-rw-r--r-- | apps/plugins/sdl/src/video/ataricommon/SDL_atarigl.c | 1086 |
1 files changed, 1086 insertions, 0 deletions
diff --git a/apps/plugins/sdl/src/video/ataricommon/SDL_atarigl.c b/apps/plugins/sdl/src/video/ataricommon/SDL_atarigl.c new file mode 100644 index 0000000000..1cf2689c95 --- /dev/null +++ b/apps/plugins/sdl/src/video/ataricommon/SDL_atarigl.c | |||
@@ -0,0 +1,1086 @@ | |||
1 | /* | ||
2 | SDL - Simple DirectMedia Layer | ||
3 | Copyright (C) 1997-2012 Sam Lantinga | ||
4 | |||
5 | This library is free software; you can redistribute it and/or | ||
6 | modify it under the terms of the GNU Library General Public | ||
7 | License as published by the Free Software Foundation; either | ||
8 | version 2 of the License, or (at your option) any later version. | ||
9 | |||
10 | This library is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Library General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Library General Public | ||
16 | License along with this library; if not, write to the Free | ||
17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
18 | |||
19 | Sam Lantinga | ||
20 | slouken@libsdl.org | ||
21 | */ | ||
22 | #include "SDL_config.h" | ||
23 | |||
24 | /* Atari OSMesa.ldg implementation of SDL OpenGL support */ | ||
25 | |||
26 | /*--- Includes ---*/ | ||
27 | |||
28 | #if SDL_VIDEO_OPENGL | ||
29 | #include <GL/osmesa.h> | ||
30 | #endif | ||
31 | |||
32 | #include <mint/osbind.h> | ||
33 | |||
34 | #include "SDL_endian.h" | ||
35 | #include "SDL_video.h" | ||
36 | #include "SDL_atarigl_c.h" | ||
37 | #if SDL_VIDEO_OPENGL_OSMESA_DYNAMIC | ||
38 | #include "SDL_loadso.h" | ||
39 | #endif | ||
40 | |||
41 | /*--- Defines ---*/ | ||
42 | |||
43 | #define PATH_OSMESA_LDG "osmesa.ldg" | ||
44 | #define PATH_MESAGL_LDG "mesa_gl.ldg" | ||
45 | #define PATH_TINYGL_LDG "tiny_gl.ldg" | ||
46 | |||
47 | #define VDI_RGB 0xf | ||
48 | |||
49 | /*--- Functions prototypes ---*/ | ||
50 | |||
51 | #if SDL_VIDEO_OPENGL | ||
52 | static void SDL_AtariGL_UnloadLibrary(_THIS); | ||
53 | |||
54 | static void CopyShadowNull(_THIS, SDL_Surface *surface); | ||
55 | static void CopyShadowDirect(_THIS, SDL_Surface *surface); | ||
56 | static void CopyShadowRGBTo555(_THIS, SDL_Surface *surface); | ||
57 | static void CopyShadowRGBTo565(_THIS, SDL_Surface *surface); | ||
58 | static void CopyShadowRGBSwap(_THIS, SDL_Surface *surface); | ||
59 | static void CopyShadowRGBToARGB(_THIS, SDL_Surface *surface); | ||
60 | static void CopyShadowRGBToABGR(_THIS, SDL_Surface *surface); | ||
61 | static void CopyShadowRGBToBGRA(_THIS, SDL_Surface *surface); | ||
62 | static void CopyShadowRGBToRGBA(_THIS, SDL_Surface *surface); | ||
63 | static void CopyShadow8888To555(_THIS, SDL_Surface *surface); | ||
64 | static void CopyShadow8888To565(_THIS, SDL_Surface *surface); | ||
65 | |||
66 | static void ConvertNull(_THIS, SDL_Surface *surface); | ||
67 | static void Convert565To555be(_THIS, SDL_Surface *surface); | ||
68 | static void Convert565To555le(_THIS, SDL_Surface *surface); | ||
69 | static void Convert565le(_THIS, SDL_Surface *surface); | ||
70 | static void ConvertBGRAToABGR(_THIS, SDL_Surface *surface); | ||
71 | |||
72 | static int InitNew(_THIS, SDL_Surface *current); | ||
73 | static int InitOld(_THIS, SDL_Surface *current); | ||
74 | #endif | ||
75 | |||
76 | /*--- Public functions ---*/ | ||
77 | |||
78 | int SDL_AtariGL_Init(_THIS, SDL_Surface *current) | ||
79 | { | ||
80 | #if SDL_VIDEO_OPENGL | ||
81 | if (gl_oldmesa) { | ||
82 | gl_active = InitOld(this, current); | ||
83 | } else { | ||
84 | gl_active = InitNew(this, current); | ||
85 | } | ||
86 | #endif | ||
87 | |||
88 | return (gl_active); | ||
89 | } | ||
90 | |||
91 | void SDL_AtariGL_Quit(_THIS, SDL_bool unload) | ||
92 | { | ||
93 | #if SDL_VIDEO_OPENGL | ||
94 | if (gl_oldmesa) { | ||
95 | /* Old mesa implementations */ | ||
96 | if (this->gl_data->OSMesaDestroyLDG) { | ||
97 | this->gl_data->OSMesaDestroyLDG(); | ||
98 | } | ||
99 | if (gl_shadow) { | ||
100 | Mfree(gl_shadow); | ||
101 | gl_shadow = NULL; | ||
102 | } | ||
103 | } else { | ||
104 | /* New mesa implementation */ | ||
105 | if (gl_ctx) { | ||
106 | if (this->gl_data->OSMesaDestroyContext) { | ||
107 | this->gl_data->OSMesaDestroyContext(gl_ctx); | ||
108 | } | ||
109 | gl_ctx = NULL; | ||
110 | } | ||
111 | } | ||
112 | |||
113 | if (unload) { | ||
114 | SDL_AtariGL_UnloadLibrary(this); | ||
115 | } | ||
116 | |||
117 | #endif /* SDL_VIDEO_OPENGL */ | ||
118 | gl_active = 0; | ||
119 | } | ||
120 | |||
121 | int SDL_AtariGL_LoadLibrary(_THIS, const char *path) | ||
122 | { | ||
123 | #if SDL_VIDEO_OPENGL | ||
124 | |||
125 | #if SDL_VIDEO_OPENGL_OSMESA_DYNAMIC | ||
126 | void *handle; | ||
127 | SDL_bool cancel_load; | ||
128 | |||
129 | if (gl_active) { | ||
130 | SDL_SetError("OpenGL context already created"); | ||
131 | return -1; | ||
132 | } | ||
133 | |||
134 | /* Unload previous driver */ | ||
135 | SDL_AtariGL_UnloadLibrary(this); | ||
136 | |||
137 | /* Load library given by path */ | ||
138 | handle = SDL_LoadObject(path); | ||
139 | if (handle == NULL) { | ||
140 | /* Try to load another one */ | ||
141 | path = SDL_getenv("SDL_VIDEO_GL_DRIVER"); | ||
142 | if ( path != NULL ) { | ||
143 | handle = SDL_LoadObject(path); | ||
144 | } | ||
145 | |||
146 | /* If it does not work, try some other */ | ||
147 | if (handle == NULL) { | ||
148 | path = PATH_OSMESA_LDG; | ||
149 | handle = SDL_LoadObject(path); | ||
150 | } | ||
151 | |||
152 | if (handle == NULL) { | ||
153 | path = PATH_MESAGL_LDG; | ||
154 | handle = SDL_LoadObject(path); | ||
155 | } | ||
156 | |||
157 | if (handle == NULL) { | ||
158 | path = PATH_TINYGL_LDG; | ||
159 | handle = SDL_LoadObject(path); | ||
160 | } | ||
161 | } | ||
162 | |||
163 | if (handle == NULL) { | ||
164 | SDL_SetError("Could not load OpenGL library"); | ||
165 | return -1; | ||
166 | } | ||
167 | |||
168 | this->gl_data->glGetIntegerv = SDL_LoadFunction(handle, "glGetIntegerv"); | ||
169 | this->gl_data->glFinish = SDL_LoadFunction(handle, "glFinish"); | ||
170 | this->gl_data->glFlush = SDL_LoadFunction(handle, "glFlush"); | ||
171 | |||
172 | cancel_load = SDL_FALSE; | ||
173 | if (this->gl_data->glGetIntegerv == NULL) { | ||
174 | cancel_load = SDL_TRUE; | ||
175 | } else { | ||
176 | /* We need either glFinish (OSMesa) or glFlush (TinyGL) */ | ||
177 | if ((this->gl_data->glFinish == NULL) && | ||
178 | (this->gl_data->glFlush == NULL)) { | ||
179 | cancel_load = SDL_TRUE; | ||
180 | } | ||
181 | } | ||
182 | if (cancel_load) { | ||
183 | SDL_SetError("Could not retrieve OpenGL functions"); | ||
184 | SDL_UnloadObject(handle); | ||
185 | /* Restore pointers to static library */ | ||
186 | SDL_AtariGL_InitPointers(this); | ||
187 | return -1; | ||
188 | } | ||
189 | |||
190 | /* Load functions pointers (osmesa.ldg) */ | ||
191 | this->gl_data->OSMesaCreateContextExt = SDL_LoadFunction(handle, "OSMesaCreateContextExt"); | ||
192 | this->gl_data->OSMesaDestroyContext = SDL_LoadFunction(handle, "OSMesaDestroyContext"); | ||
193 | this->gl_data->OSMesaMakeCurrent = SDL_LoadFunction(handle, "OSMesaMakeCurrent"); | ||
194 | this->gl_data->OSMesaPixelStore = SDL_LoadFunction(handle, "OSMesaPixelStore"); | ||
195 | this->gl_data->OSMesaGetProcAddress = SDL_LoadFunction(handle, "OSMesaGetProcAddress"); | ||
196 | |||
197 | /* Load old functions pointers (mesa_gl.ldg, tiny_gl.ldg) */ | ||
198 | this->gl_data->OSMesaCreateLDG = SDL_LoadFunction(handle, "OSMesaCreateLDG"); | ||
199 | this->gl_data->OSMesaDestroyLDG = SDL_LoadFunction(handle, "OSMesaDestroyLDG"); | ||
200 | |||
201 | gl_oldmesa = 0; | ||
202 | |||
203 | if ( (this->gl_data->OSMesaCreateContextExt == NULL) || | ||
204 | (this->gl_data->OSMesaDestroyContext == NULL) || | ||
205 | (this->gl_data->OSMesaMakeCurrent == NULL) || | ||
206 | (this->gl_data->OSMesaPixelStore == NULL) || | ||
207 | (this->gl_data->OSMesaGetProcAddress == NULL)) { | ||
208 | /* Hum, maybe old library ? */ | ||
209 | if ( (this->gl_data->OSMesaCreateLDG == NULL) || | ||
210 | (this->gl_data->OSMesaDestroyLDG == NULL)) { | ||
211 | SDL_SetError("Could not retrieve OSMesa functions"); | ||
212 | SDL_UnloadObject(handle); | ||
213 | /* Restore pointers to static library */ | ||
214 | SDL_AtariGL_InitPointers(this); | ||
215 | return -1; | ||
216 | } else { | ||
217 | gl_oldmesa = 1; | ||
218 | } | ||
219 | } | ||
220 | |||
221 | this->gl_config.dll_handle = handle; | ||
222 | if ( path ) { | ||
223 | SDL_strlcpy(this->gl_config.driver_path, path, | ||
224 | SDL_arraysize(this->gl_config.driver_path)); | ||
225 | } else { | ||
226 | *this->gl_config.driver_path = '\0'; | ||
227 | } | ||
228 | |||
229 | #endif | ||
230 | this->gl_config.driver_loaded = 1; | ||
231 | |||
232 | return 0; | ||
233 | #else | ||
234 | return -1; | ||
235 | #endif | ||
236 | } | ||
237 | |||
238 | void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc) | ||
239 | { | ||
240 | void *func = NULL; | ||
241 | #if SDL_VIDEO_OPENGL | ||
242 | |||
243 | if (this->gl_config.dll_handle) { | ||
244 | func = SDL_LoadFunction(this->gl_config.dll_handle, (void *)proc); | ||
245 | } else if (this->gl_data->OSMesaGetProcAddress) { | ||
246 | func = this->gl_data->OSMesaGetProcAddress(proc); | ||
247 | } | ||
248 | |||
249 | #endif | ||
250 | return func; | ||
251 | } | ||
252 | |||
253 | int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) | ||
254 | { | ||
255 | #if SDL_VIDEO_OPENGL | ||
256 | GLenum mesa_attrib; | ||
257 | SDL_Surface *surface; | ||
258 | |||
259 | if (!gl_active) { | ||
260 | return -1; | ||
261 | } | ||
262 | |||
263 | switch(attrib) { | ||
264 | case SDL_GL_RED_SIZE: | ||
265 | mesa_attrib = GL_RED_BITS; | ||
266 | break; | ||
267 | case SDL_GL_GREEN_SIZE: | ||
268 | mesa_attrib = GL_GREEN_BITS; | ||
269 | break; | ||
270 | case SDL_GL_BLUE_SIZE: | ||
271 | mesa_attrib = GL_BLUE_BITS; | ||
272 | break; | ||
273 | case SDL_GL_ALPHA_SIZE: | ||
274 | mesa_attrib = GL_ALPHA_BITS; | ||
275 | break; | ||
276 | case SDL_GL_DOUBLEBUFFER: | ||
277 | surface = this->screen; | ||
278 | *value = ((surface->flags & SDL_DOUBLEBUF)==SDL_DOUBLEBUF); | ||
279 | return 0; | ||
280 | case SDL_GL_DEPTH_SIZE: | ||
281 | mesa_attrib = GL_DEPTH_BITS; | ||
282 | break; | ||
283 | case SDL_GL_STENCIL_SIZE: | ||
284 | mesa_attrib = GL_STENCIL_BITS; | ||
285 | break; | ||
286 | case SDL_GL_ACCUM_RED_SIZE: | ||
287 | mesa_attrib = GL_ACCUM_RED_BITS; | ||
288 | break; | ||
289 | case SDL_GL_ACCUM_GREEN_SIZE: | ||
290 | mesa_attrib = GL_ACCUM_GREEN_BITS; | ||
291 | break; | ||
292 | case SDL_GL_ACCUM_BLUE_SIZE: | ||
293 | mesa_attrib = GL_ACCUM_BLUE_BITS; | ||
294 | break; | ||
295 | case SDL_GL_ACCUM_ALPHA_SIZE: | ||
296 | mesa_attrib = GL_ACCUM_ALPHA_BITS; | ||
297 | break; | ||
298 | default : | ||
299 | return -1; | ||
300 | } | ||
301 | |||
302 | this->gl_data->glGetIntegerv(mesa_attrib, value); | ||
303 | return 0; | ||
304 | #else | ||
305 | return -1; | ||
306 | #endif | ||
307 | } | ||
308 | |||
309 | int SDL_AtariGL_MakeCurrent(_THIS) | ||
310 | { | ||
311 | #if SDL_VIDEO_OPENGL | ||
312 | SDL_Surface *surface; | ||
313 | GLenum type; | ||
314 | |||
315 | if (gl_oldmesa && gl_active) { | ||
316 | return 0; | ||
317 | } | ||
318 | |||
319 | if (this->gl_config.dll_handle) { | ||
320 | if ((this->gl_data->OSMesaMakeCurrent == NULL) || | ||
321 | (this->gl_data->OSMesaPixelStore == NULL)) { | ||
322 | return -1; | ||
323 | } | ||
324 | } | ||
325 | |||
326 | if (!gl_active) { | ||
327 | SDL_SetError("Invalid OpenGL context"); | ||
328 | return -1; | ||
329 | } | ||
330 | |||
331 | surface = this->screen; | ||
332 | |||
333 | if ((surface->format->BitsPerPixel == 15) || (surface->format->BitsPerPixel == 16)) { | ||
334 | type = GL_UNSIGNED_SHORT_5_6_5; | ||
335 | } else { | ||
336 | type = GL_UNSIGNED_BYTE; | ||
337 | } | ||
338 | |||
339 | if (!(this->gl_data->OSMesaMakeCurrent(gl_ctx, surface->pixels, type, surface->w, surface->h))) { | ||
340 | SDL_SetError("Can not make OpenGL context current"); | ||
341 | return -1; | ||
342 | } | ||
343 | |||
344 | /* OSMesa draws upside down */ | ||
345 | this->gl_data->OSMesaPixelStore(OSMESA_Y_UP, 0); | ||
346 | |||
347 | return 0; | ||
348 | #else | ||
349 | return -1; | ||
350 | #endif | ||
351 | } | ||
352 | |||
353 | void SDL_AtariGL_SwapBuffers(_THIS) | ||
354 | { | ||
355 | #if SDL_VIDEO_OPENGL | ||
356 | if (gl_active) { | ||
357 | if (this->gl_config.dll_handle) { | ||
358 | if (this->gl_data->glFinish) { | ||
359 | this->gl_data->glFinish(); | ||
360 | } else if (this->gl_data->glFlush) { | ||
361 | this->gl_data->glFlush(); | ||
362 | } | ||
363 | } else { | ||
364 | this->gl_data->glFinish(); | ||
365 | } | ||
366 | gl_copyshadow(this, this->screen); | ||
367 | gl_convert(this, this->screen); | ||
368 | } | ||
369 | #endif | ||
370 | } | ||
371 | |||
372 | void SDL_AtariGL_InitPointers(_THIS) | ||
373 | { | ||
374 | #if SDL_VIDEO_OPENGL | ||
375 | this->gl_data->OSMesaCreateContextExt = OSMesaCreateContextExt; | ||
376 | this->gl_data->OSMesaDestroyContext = OSMesaDestroyContext; | ||
377 | this->gl_data->OSMesaMakeCurrent = OSMesaMakeCurrent; | ||
378 | this->gl_data->OSMesaPixelStore = OSMesaPixelStore; | ||
379 | this->gl_data->OSMesaGetProcAddress = OSMesaGetProcAddress; | ||
380 | |||
381 | this->gl_data->glGetIntegerv = glGetIntegerv; | ||
382 | this->gl_data->glFinish = glFinish; | ||
383 | this->gl_data->glFlush = glFlush; | ||
384 | |||
385 | this->gl_data->OSMesaCreateLDG = NULL; | ||
386 | this->gl_data->OSMesaDestroyLDG = NULL; | ||
387 | #endif | ||
388 | } | ||
389 | |||
390 | /*--- Private functions ---*/ | ||
391 | |||
392 | #if SDL_VIDEO_OPENGL | ||
393 | static void SDL_AtariGL_UnloadLibrary(_THIS) | ||
394 | { | ||
395 | if (this->gl_config.dll_handle) { | ||
396 | SDL_UnloadObject(this->gl_config.dll_handle); | ||
397 | this->gl_config.dll_handle = NULL; | ||
398 | |||
399 | /* Restore pointers to static library */ | ||
400 | SDL_AtariGL_InitPointers(this); | ||
401 | } | ||
402 | } | ||
403 | |||
404 | /*--- Creation of an OpenGL context using new/old functions ---*/ | ||
405 | |||
406 | static int InitNew(_THIS, SDL_Surface *current) | ||
407 | { | ||
408 | GLenum osmesa_format; | ||
409 | SDL_PixelFormat *pixel_format; | ||
410 | Uint32 redmask; | ||
411 | int recreatecontext; | ||
412 | GLint newaccumsize; | ||
413 | |||
414 | if (this->gl_config.dll_handle) { | ||
415 | if (this->gl_data->OSMesaCreateContextExt == NULL) { | ||
416 | return 0; | ||
417 | } | ||
418 | } | ||
419 | |||
420 | /* Init OpenGL context using OSMesa */ | ||
421 | gl_convert = ConvertNull; | ||
422 | gl_copyshadow = CopyShadowNull; | ||
423 | gl_upsidedown = SDL_FALSE; | ||
424 | |||
425 | pixel_format = current->format; | ||
426 | redmask = pixel_format->Rmask; | ||
427 | switch (pixel_format->BitsPerPixel) { | ||
428 | case 15: | ||
429 | /* 1555, big and little endian, unsupported */ | ||
430 | gl_pixelsize = 2; | ||
431 | osmesa_format = OSMESA_RGB_565; | ||
432 | if (redmask == 31<<10) { | ||
433 | gl_convert = Convert565To555be; | ||
434 | } else { | ||
435 | gl_convert = Convert565To555le; | ||
436 | } | ||
437 | break; | ||
438 | case 16: | ||
439 | gl_pixelsize = 2; | ||
440 | if (redmask == 31<<11) { | ||
441 | osmesa_format = OSMESA_RGB_565; | ||
442 | } else { | ||
443 | /* 565, little endian, unsupported */ | ||
444 | osmesa_format = OSMESA_RGB_565; | ||
445 | gl_convert = Convert565le; | ||
446 | } | ||
447 | break; | ||
448 | case 24: | ||
449 | gl_pixelsize = 3; | ||
450 | if (redmask == 255<<16) { | ||
451 | osmesa_format = OSMESA_RGB; | ||
452 | } else { | ||
453 | osmesa_format = OSMESA_BGR; | ||
454 | } | ||
455 | break; | ||
456 | case 32: | ||
457 | gl_pixelsize = 4; | ||
458 | if (redmask == 255<<16) { | ||
459 | osmesa_format = OSMESA_ARGB; | ||
460 | } else if (redmask == 255<<8) { | ||
461 | osmesa_format = OSMESA_BGRA; | ||
462 | } else if (redmask == 255<<24) { | ||
463 | osmesa_format = OSMESA_RGBA; | ||
464 | } else { | ||
465 | /* ABGR format unsupported */ | ||
466 | osmesa_format = OSMESA_BGRA; | ||
467 | gl_convert = ConvertBGRAToABGR; | ||
468 | } | ||
469 | break; | ||
470 | default: | ||
471 | gl_pixelsize = 1; | ||
472 | osmesa_format = OSMESA_COLOR_INDEX; | ||
473 | break; | ||
474 | } | ||
475 | |||
476 | /* Try to keep current context if possible */ | ||
477 | newaccumsize = | ||
478 | this->gl_config.accum_red_size + | ||
479 | this->gl_config.accum_green_size + | ||
480 | this->gl_config.accum_blue_size + | ||
481 | this->gl_config.accum_alpha_size; | ||
482 | recreatecontext=1; | ||
483 | if (gl_ctx && | ||
484 | (gl_curformat == osmesa_format) && | ||
485 | (gl_curdepth == this->gl_config.depth_size) && | ||
486 | (gl_curstencil == this->gl_config.stencil_size) && | ||
487 | (gl_curaccum == newaccumsize)) { | ||
488 | recreatecontext = 0; | ||
489 | } | ||
490 | if (recreatecontext) { | ||
491 | SDL_AtariGL_Quit(this, SDL_FALSE); | ||
492 | |||
493 | gl_ctx = this->gl_data->OSMesaCreateContextExt( | ||
494 | osmesa_format, this->gl_config.depth_size, | ||
495 | this->gl_config.stencil_size, newaccumsize, NULL ); | ||
496 | |||
497 | if (gl_ctx) { | ||
498 | gl_curformat = osmesa_format; | ||
499 | gl_curdepth = this->gl_config.depth_size; | ||
500 | gl_curstencil = this->gl_config.stencil_size; | ||
501 | gl_curaccum = newaccumsize; | ||
502 | } else { | ||
503 | gl_curformat = 0; | ||
504 | gl_curdepth = 0; | ||
505 | gl_curstencil = 0; | ||
506 | gl_curaccum = 0; | ||
507 | } | ||
508 | } | ||
509 | |||
510 | return (gl_ctx != NULL); | ||
511 | } | ||
512 | |||
513 | |||
514 | static int InitOld(_THIS, SDL_Surface *current) | ||
515 | { | ||
516 | GLenum osmesa_format; | ||
517 | SDL_PixelFormat *pixel_format; | ||
518 | Uint32 redmask; | ||
519 | int recreatecontext, tinygl_present; | ||
520 | |||
521 | if (this->gl_config.dll_handle) { | ||
522 | if (this->gl_data->OSMesaCreateLDG == NULL) { | ||
523 | return 0; | ||
524 | } | ||
525 | } | ||
526 | |||
527 | /* TinyGL only supports VDI_RGB (OSMESA_RGB) */ | ||
528 | tinygl_present=0; | ||
529 | if (this->gl_config.dll_handle) { | ||
530 | if (this->gl_data->glFinish == NULL) { | ||
531 | tinygl_present=1; | ||
532 | } | ||
533 | } | ||
534 | |||
535 | /* Init OpenGL context using OSMesa */ | ||
536 | gl_convert = ConvertNull; | ||
537 | gl_copyshadow = CopyShadowNull; | ||
538 | gl_upsidedown = SDL_FALSE; | ||
539 | |||
540 | pixel_format = current->format; | ||
541 | redmask = pixel_format->Rmask; | ||
542 | switch (pixel_format->BitsPerPixel) { | ||
543 | case 15: | ||
544 | /* 15 bits unsupported */ | ||
545 | if (tinygl_present) { | ||
546 | gl_pixelsize = 3; | ||
547 | osmesa_format = VDI_RGB; | ||
548 | if (redmask == 31<<10) { | ||
549 | gl_copyshadow = CopyShadowRGBTo555; | ||
550 | } else { | ||
551 | gl_copyshadow = CopyShadowRGBTo565; | ||
552 | gl_convert = Convert565To555le; | ||
553 | } | ||
554 | } else { | ||
555 | gl_pixelsize = 4; | ||
556 | gl_upsidedown = SDL_TRUE; | ||
557 | osmesa_format = OSMESA_ARGB; | ||
558 | if (redmask == 31<<10) { | ||
559 | gl_copyshadow = CopyShadow8888To555; | ||
560 | } else { | ||
561 | gl_copyshadow = CopyShadow8888To565; | ||
562 | gl_convert = Convert565To555le; | ||
563 | } | ||
564 | } | ||
565 | break; | ||
566 | case 16: | ||
567 | /* 16 bits unsupported */ | ||
568 | if (tinygl_present) { | ||
569 | gl_pixelsize = 3; | ||
570 | osmesa_format = VDI_RGB; | ||
571 | gl_copyshadow = CopyShadowRGBTo565; | ||
572 | if (redmask != 31<<11) { | ||
573 | /* 565, little endian, unsupported */ | ||
574 | gl_convert = Convert565le; | ||
575 | } | ||
576 | } else { | ||
577 | gl_pixelsize = 4; | ||
578 | gl_upsidedown = SDL_TRUE; | ||
579 | osmesa_format = OSMESA_ARGB; | ||
580 | gl_copyshadow = CopyShadow8888To565; | ||
581 | if (redmask != 31<<11) { | ||
582 | /* 565, little endian, unsupported */ | ||
583 | gl_convert = Convert565le; | ||
584 | } | ||
585 | } | ||
586 | break; | ||
587 | case 24: | ||
588 | gl_pixelsize = 3; | ||
589 | if (tinygl_present) { | ||
590 | osmesa_format = VDI_RGB; | ||
591 | gl_copyshadow = CopyShadowDirect; | ||
592 | if (redmask != 255<<16) { | ||
593 | gl_copyshadow = CopyShadowRGBSwap; | ||
594 | } | ||
595 | } else { | ||
596 | gl_copyshadow = CopyShadowDirect; | ||
597 | gl_upsidedown = SDL_TRUE; | ||
598 | if (redmask == 255<<16) { | ||
599 | osmesa_format = OSMESA_RGB; | ||
600 | } else { | ||
601 | osmesa_format = OSMESA_BGR; | ||
602 | } | ||
603 | } | ||
604 | break; | ||
605 | case 32: | ||
606 | if (tinygl_present) { | ||
607 | gl_pixelsize = 3; | ||
608 | osmesa_format = VDI_RGB; | ||
609 | gl_copyshadow = CopyShadowRGBToARGB; | ||
610 | if (redmask == 255) { | ||
611 | gl_convert = CopyShadowRGBToABGR; | ||
612 | } else if (redmask == 255<<8) { | ||
613 | gl_convert = CopyShadowRGBToBGRA; | ||
614 | } else if (redmask == 255<<24) { | ||
615 | gl_convert = CopyShadowRGBToRGBA; | ||
616 | } | ||
617 | } else { | ||
618 | gl_pixelsize = 4; | ||
619 | gl_upsidedown = SDL_TRUE; | ||
620 | gl_copyshadow = CopyShadowDirect; | ||
621 | if (redmask == 255<<16) { | ||
622 | osmesa_format = OSMESA_ARGB; | ||
623 | } else if (redmask == 255<<8) { | ||
624 | osmesa_format = OSMESA_BGRA; | ||
625 | } else if (redmask == 255<<24) { | ||
626 | osmesa_format = OSMESA_RGBA; | ||
627 | } else { | ||
628 | /* ABGR format unsupported */ | ||
629 | osmesa_format = OSMESA_BGRA; | ||
630 | gl_convert = ConvertBGRAToABGR; | ||
631 | } | ||
632 | } | ||
633 | break; | ||
634 | default: | ||
635 | if (tinygl_present) { | ||
636 | SDL_AtariGL_Quit(this, SDL_FALSE); | ||
637 | return 0; | ||
638 | } | ||
639 | gl_pixelsize = 1; | ||
640 | gl_copyshadow = CopyShadowDirect; | ||
641 | osmesa_format = OSMESA_COLOR_INDEX; | ||
642 | break; | ||
643 | } | ||
644 | |||
645 | /* Try to keep current context if possible */ | ||
646 | recreatecontext=1; | ||
647 | if (gl_shadow && | ||
648 | (gl_curformat == osmesa_format) && | ||
649 | (gl_curwidth == current->w) && | ||
650 | (gl_curheight == current->h)) { | ||
651 | recreatecontext = 0; | ||
652 | } | ||
653 | if (recreatecontext) { | ||
654 | SDL_AtariGL_Quit(this, SDL_FALSE); | ||
655 | |||
656 | gl_shadow = this->gl_data->OSMesaCreateLDG( | ||
657 | osmesa_format, GL_UNSIGNED_BYTE, current->w, current->h | ||
658 | ); | ||
659 | |||
660 | if (gl_shadow) { | ||
661 | gl_curformat = osmesa_format; | ||
662 | gl_curwidth = current->w; | ||
663 | gl_curheight = current->h; | ||
664 | } else { | ||
665 | gl_curformat = 0; | ||
666 | gl_curwidth = 0; | ||
667 | gl_curheight = 0; | ||
668 | } | ||
669 | } | ||
670 | |||
671 | return (gl_shadow != NULL); | ||
672 | } | ||
673 | |||
674 | /*--- Conversions routines from shadow buffer to the screen ---*/ | ||
675 | |||
676 | static void CopyShadowNull(_THIS, SDL_Surface *surface) | ||
677 | { | ||
678 | } | ||
679 | |||
680 | static void CopyShadowDirect(_THIS, SDL_Surface *surface) | ||
681 | { | ||
682 | int y, srcpitch, dstpitch; | ||
683 | Uint8 *srcline, *dstline; | ||
684 | |||
685 | srcline = gl_shadow; | ||
686 | srcpitch = surface->w * gl_pixelsize; | ||
687 | dstline = surface->pixels; | ||
688 | dstpitch = surface->pitch; | ||
689 | if (gl_upsidedown) { | ||
690 | srcline += (surface->h-1)*srcpitch; | ||
691 | srcpitch = -srcpitch; | ||
692 | } | ||
693 | |||
694 | for (y=0; y<surface->h; y++) { | ||
695 | SDL_memcpy(dstline, srcline, srcpitch); | ||
696 | |||
697 | srcline += srcpitch; | ||
698 | dstline += dstpitch; | ||
699 | } | ||
700 | } | ||
701 | |||
702 | static void CopyShadowRGBTo555(_THIS, SDL_Surface *surface) | ||
703 | { | ||
704 | int x,y, srcpitch, dstpitch; | ||
705 | Uint16 *dstline, *dstcol; | ||
706 | Uint8 *srcline, *srccol; | ||
707 | |||
708 | srcline = (Uint8 *)gl_shadow; | ||
709 | srcpitch = surface->w * gl_pixelsize; | ||
710 | dstline = surface->pixels; | ||
711 | dstpitch = surface->pitch >>1; | ||
712 | if (gl_upsidedown) { | ||
713 | srcline += (surface->h-1)*srcpitch; | ||
714 | srcpitch = -srcpitch; | ||
715 | } | ||
716 | |||
717 | for (y=0; y<surface->h; y++) { | ||
718 | srccol = srcline; | ||
719 | dstcol = dstline; | ||
720 | for (x=0; x<surface->w; x++) { | ||
721 | Uint16 dstcolor; | ||
722 | |||
723 | dstcolor = ((*srccol++)<<7) & (31<<10); | ||
724 | dstcolor |= ((*srccol++)<<2) & (31<<5); | ||
725 | dstcolor |= ((*srccol++)>>3) & 31; | ||
726 | *dstcol++ = dstcolor; | ||
727 | } | ||
728 | |||
729 | srcline += srcpitch; | ||
730 | dstline += dstpitch; | ||
731 | } | ||
732 | } | ||
733 | |||
734 | static void CopyShadowRGBTo565(_THIS, SDL_Surface *surface) | ||
735 | { | ||
736 | int x,y, srcpitch, dstpitch; | ||
737 | Uint16 *dstline, *dstcol; | ||
738 | Uint8 *srcline, *srccol; | ||
739 | |||
740 | srcline = (Uint8 *)gl_shadow; | ||
741 | srcpitch = surface->w * gl_pixelsize; | ||
742 | dstline = surface->pixels; | ||
743 | dstpitch = surface->pitch >>1; | ||
744 | if (gl_upsidedown) { | ||
745 | srcline += (surface->h-1)*srcpitch; | ||
746 | srcpitch = -srcpitch; | ||
747 | } | ||
748 | |||
749 | for (y=0; y<surface->h; y++) { | ||
750 | srccol = srcline; | ||
751 | dstcol = dstline; | ||
752 | |||
753 | for (x=0; x<surface->w; x++) { | ||
754 | Uint16 dstcolor; | ||
755 | |||
756 | dstcolor = ((*srccol++)<<8) & (31<<11); | ||
757 | dstcolor |= ((*srccol++)<<3) & (63<<5); | ||
758 | dstcolor |= ((*srccol++)>>3) & 31; | ||
759 | *dstcol++ = dstcolor; | ||
760 | } | ||
761 | |||
762 | srcline += srcpitch; | ||
763 | dstline += dstpitch; | ||
764 | } | ||
765 | } | ||
766 | |||
767 | static void CopyShadowRGBSwap(_THIS, SDL_Surface *surface) | ||
768 | { | ||
769 | int x,y, srcpitch, dstpitch; | ||
770 | Uint8 *dstline, *dstcol; | ||
771 | Uint8 *srcline, *srccol; | ||
772 | |||
773 | srcline = (Uint8 *)gl_shadow; | ||
774 | srcpitch = surface->w * gl_pixelsize; | ||
775 | dstline = surface->pixels; | ||
776 | dstpitch = surface->pitch; | ||
777 | if (gl_upsidedown) { | ||
778 | srcline += (surface->h-1)*srcpitch; | ||
779 | srcpitch = -srcpitch; | ||
780 | } | ||
781 | |||
782 | for (y=0; y<surface->h; y++) { | ||
783 | srccol = srcline; | ||
784 | dstcol = dstline; | ||
785 | |||
786 | for (x=0; x<surface->w; x++) { | ||
787 | *dstcol++ = srccol[2]; | ||
788 | *dstcol++ = srccol[1]; | ||
789 | *dstcol++ = srccol[0]; | ||
790 | srccol += 3; | ||
791 | } | ||
792 | |||
793 | srcline += srcpitch; | ||
794 | dstline += dstpitch; | ||
795 | } | ||
796 | } | ||
797 | |||
798 | static void CopyShadowRGBToARGB(_THIS, SDL_Surface *surface) | ||
799 | { | ||
800 | int x,y, srcpitch, dstpitch; | ||
801 | Uint32 *dstline, *dstcol; | ||
802 | Uint8 *srcline, *srccol; | ||
803 | |||
804 | srcline = (Uint8 *)gl_shadow; | ||
805 | srcpitch = surface->w * gl_pixelsize; | ||
806 | dstline = surface->pixels; | ||
807 | dstpitch = surface->pitch >>2; | ||
808 | if (gl_upsidedown) { | ||
809 | srcline += (surface->h-1)*srcpitch; | ||
810 | srcpitch = -srcpitch; | ||
811 | } | ||
812 | |||
813 | for (y=0; y<surface->h; y++) { | ||
814 | srccol = srcline; | ||
815 | dstcol = dstline; | ||
816 | |||
817 | for (x=0; x<surface->w; x++) { | ||
818 | Uint32 dstcolor; | ||
819 | |||
820 | dstcolor = (*srccol++)<<16; | ||
821 | dstcolor |= (*srccol++)<<8; | ||
822 | dstcolor |= *srccol++; | ||
823 | |||
824 | *dstcol++ = dstcolor; | ||
825 | } | ||
826 | |||
827 | srcline += srcpitch; | ||
828 | dstline += dstpitch; | ||
829 | } | ||
830 | } | ||
831 | |||
832 | static void CopyShadowRGBToABGR(_THIS, SDL_Surface *surface) | ||
833 | { | ||
834 | int x,y, srcpitch, dstpitch; | ||
835 | Uint32 *dstline, *dstcol; | ||
836 | Uint8 *srcline, *srccol; | ||
837 | |||
838 | srcline = (Uint8 *)gl_shadow; | ||
839 | srcpitch = surface->w * gl_pixelsize; | ||
840 | dstline = surface->pixels; | ||
841 | dstpitch = surface->pitch >>2; | ||
842 | if (gl_upsidedown) { | ||
843 | srcline += (surface->h-1)*srcpitch; | ||
844 | srcpitch = -srcpitch; | ||
845 | } | ||
846 | |||
847 | for (y=0; y<surface->h; y++) { | ||
848 | srccol = srcline; | ||
849 | dstcol = dstline; | ||
850 | |||
851 | for (x=0; x<surface->w; x++) { | ||
852 | Uint32 dstcolor; | ||
853 | |||
854 | dstcolor = *srccol++; | ||
855 | dstcolor |= (*srccol++)<<8; | ||
856 | dstcolor |= (*srccol++)<<16; | ||
857 | |||
858 | *dstcol++ = dstcolor; | ||
859 | } | ||
860 | |||
861 | srcline += srcpitch; | ||
862 | dstline += dstpitch; | ||
863 | } | ||
864 | } | ||
865 | |||
866 | static void CopyShadowRGBToBGRA(_THIS, SDL_Surface *surface) | ||
867 | { | ||
868 | int x,y, srcpitch, dstpitch; | ||
869 | Uint32 *dstline, *dstcol; | ||
870 | Uint8 *srcline, *srccol; | ||
871 | |||
872 | srcline = (Uint8 *)gl_shadow; | ||
873 | srcpitch = surface->w * gl_pixelsize; | ||
874 | dstline = surface->pixels; | ||
875 | dstpitch = surface->pitch >>2; | ||
876 | if (gl_upsidedown) { | ||
877 | srcline += (surface->h-1)*srcpitch; | ||
878 | srcpitch = -srcpitch; | ||
879 | } | ||
880 | |||
881 | for (y=0; y<surface->h; y++) { | ||
882 | srccol = srcline; | ||
883 | dstcol = dstline; | ||
884 | |||
885 | for (x=0; x<surface->w; x++) { | ||
886 | Uint32 dstcolor; | ||
887 | |||
888 | dstcolor = (*srccol++)<<8; | ||
889 | dstcolor |= (*srccol++)<<16; | ||
890 | dstcolor |= (*srccol++)<<24; | ||
891 | |||
892 | *dstcol++ = dstcolor; | ||
893 | } | ||
894 | |||
895 | srcline += srcpitch; | ||
896 | dstline += dstpitch; | ||
897 | } | ||
898 | } | ||
899 | |||
900 | static void CopyShadowRGBToRGBA(_THIS, SDL_Surface *surface) | ||
901 | { | ||
902 | int x,y, srcpitch, dstpitch; | ||
903 | Uint32 *dstline, *dstcol; | ||
904 | Uint8 *srcline, *srccol; | ||
905 | |||
906 | srcline = (Uint8 *)gl_shadow; | ||
907 | srcpitch = surface->w * gl_pixelsize; | ||
908 | dstline = surface->pixels; | ||
909 | dstpitch = surface->pitch >>2; | ||
910 | if (gl_upsidedown) { | ||
911 | srcline += (surface->h-1)*srcpitch; | ||
912 | srcpitch = -srcpitch; | ||
913 | } | ||
914 | |||
915 | for (y=0; y<surface->h; y++) { | ||
916 | srccol = srcline; | ||
917 | dstcol = dstline; | ||
918 | |||
919 | for (x=0; x<surface->w; x++) { | ||
920 | Uint32 dstcolor; | ||
921 | |||
922 | dstcolor = (*srccol++)<<24; | ||
923 | dstcolor |= (*srccol++)<<16; | ||
924 | dstcolor |= (*srccol++)<<8; | ||
925 | |||
926 | *dstcol++ = dstcolor; | ||
927 | } | ||
928 | |||
929 | srcline += srcpitch; | ||
930 | dstline += dstpitch; | ||
931 | } | ||
932 | } | ||
933 | |||
934 | static void CopyShadow8888To555(_THIS, SDL_Surface *surface) | ||
935 | { | ||
936 | int x,y, srcpitch, dstpitch; | ||
937 | Uint16 *dstline, *dstcol; | ||
938 | Uint32 *srcline, *srccol; | ||
939 | |||
940 | srcline = (Uint32 *)gl_shadow; | ||
941 | srcpitch = (surface->w * gl_pixelsize) >>2; | ||
942 | dstline = surface->pixels; | ||
943 | dstpitch = surface->pitch >>1; | ||
944 | if (gl_upsidedown) { | ||
945 | srcline += (surface->h-1)*srcpitch; | ||
946 | srcpitch = -srcpitch; | ||
947 | } | ||
948 | |||
949 | for (y=0; y<surface->h; y++) { | ||
950 | srccol = srcline; | ||
951 | dstcol = dstline; | ||
952 | for (x=0; x<surface->w; x++) { | ||
953 | Uint32 srccolor; | ||
954 | Uint16 dstcolor; | ||
955 | |||
956 | srccolor = *srccol++; | ||
957 | dstcolor = (srccolor>>9) & (31<<10); | ||
958 | dstcolor |= (srccolor>>6) & (31<<5); | ||
959 | dstcolor |= (srccolor>>3) & 31; | ||
960 | *dstcol++ = dstcolor; | ||
961 | } | ||
962 | |||
963 | srcline += srcpitch; | ||
964 | dstline += dstpitch; | ||
965 | } | ||
966 | } | ||
967 | |||
968 | static void CopyShadow8888To565(_THIS, SDL_Surface *surface) | ||
969 | { | ||
970 | int x,y, srcpitch, dstpitch; | ||
971 | Uint16 *dstline, *dstcol; | ||
972 | Uint32 *srcline, *srccol; | ||
973 | |||
974 | srcline = (Uint32 *)gl_shadow; | ||
975 | srcpitch = (surface->w * gl_pixelsize) >> 2; | ||
976 | dstline = surface->pixels; | ||
977 | dstpitch = surface->pitch >>1; | ||
978 | if (gl_upsidedown) { | ||
979 | srcline += (surface->h-1)*srcpitch; | ||
980 | srcpitch = -srcpitch; | ||
981 | } | ||
982 | |||
983 | for (y=0; y<surface->h; y++) { | ||
984 | srccol = srcline; | ||
985 | dstcol = dstline; | ||
986 | |||
987 | for (x=0; x<surface->w; x++) { | ||
988 | Uint32 srccolor; | ||
989 | Uint16 dstcolor; | ||
990 | |||
991 | srccolor = *srccol++; | ||
992 | dstcolor = (srccolor>>8) & (31<<11); | ||
993 | dstcolor |= (srccolor>>5) & (63<<5); | ||
994 | dstcolor |= (srccolor>>3) & 31; | ||
995 | *dstcol++ = dstcolor; | ||
996 | } | ||
997 | |||
998 | srcline += srcpitch; | ||
999 | dstline += dstpitch; | ||
1000 | } | ||
1001 | } | ||
1002 | |||
1003 | /*--- Conversions routines in the screen ---*/ | ||
1004 | |||
1005 | static void ConvertNull(_THIS, SDL_Surface *surface) | ||
1006 | { | ||
1007 | } | ||
1008 | |||
1009 | static void Convert565To555be(_THIS, SDL_Surface *surface) | ||
1010 | { | ||
1011 | int x,y, pitch; | ||
1012 | unsigned short *line, *pixel; | ||
1013 | |||
1014 | line = surface->pixels; | ||
1015 | pitch = surface->pitch >> 1; | ||
1016 | for (y=0; y<surface->h; y++) { | ||
1017 | pixel = line; | ||
1018 | for (x=0; x<surface->w; x++) { | ||
1019 | unsigned short color = *pixel; | ||
1020 | |||
1021 | *pixel++ = (color & 0x1f)|((color>>1) & 0xffe0); | ||
1022 | } | ||
1023 | |||
1024 | line += pitch; | ||
1025 | } | ||
1026 | } | ||
1027 | |||
1028 | static void Convert565To555le(_THIS, SDL_Surface *surface) | ||
1029 | { | ||
1030 | int x,y, pitch; | ||
1031 | unsigned short *line, *pixel; | ||
1032 | |||
1033 | line = surface->pixels; | ||
1034 | pitch = surface->pitch >>1; | ||
1035 | for (y=0; y<surface->h; y++) { | ||
1036 | pixel = line; | ||
1037 | for (x=0; x<surface->w; x++) { | ||
1038 | unsigned short color = *pixel; | ||
1039 | |||
1040 | color = (color & 0x1f)|((color>>1) & 0xffe0); | ||
1041 | *pixel++ = SDL_Swap16(color); | ||
1042 | } | ||
1043 | |||
1044 | line += pitch; | ||
1045 | } | ||
1046 | } | ||
1047 | |||
1048 | static void Convert565le(_THIS, SDL_Surface *surface) | ||
1049 | { | ||
1050 | int x,y, pitch; | ||
1051 | unsigned short *line, *pixel; | ||
1052 | |||
1053 | line = surface->pixels; | ||
1054 | pitch = surface->pitch >>1; | ||
1055 | for (y=0; y<surface->h; y++) { | ||
1056 | pixel = line; | ||
1057 | for (x=0; x<surface->w; x++) { | ||
1058 | unsigned short color = *pixel; | ||
1059 | |||
1060 | *pixel++ = SDL_Swap16(color); | ||
1061 | } | ||
1062 | |||
1063 | line += pitch; | ||
1064 | } | ||
1065 | } | ||
1066 | |||
1067 | static void ConvertBGRAToABGR(_THIS, SDL_Surface *surface) | ||
1068 | { | ||
1069 | int x,y, pitch; | ||
1070 | unsigned long *line, *pixel; | ||
1071 | |||
1072 | line = surface->pixels; | ||
1073 | pitch = surface->pitch >>2; | ||
1074 | for (y=0; y<surface->h; y++) { | ||
1075 | pixel = line; | ||
1076 | for (x=0; x<surface->w; x++) { | ||
1077 | unsigned long color = *pixel; | ||
1078 | |||
1079 | *pixel++ = (color<<24)|(color>>8); | ||
1080 | } | ||
1081 | |||
1082 | line += pitch; | ||
1083 | } | ||
1084 | } | ||
1085 | |||
1086 | #endif /* SDL_VIDEO_OPENGL */ | ||